Books

Dr Karl's Little Book of Trivia 101 Dr Karl's Little Book of Trivia 101
2015
50 Shades of Grey Matter 50 Shades of Grey Matter
2012
Brain Food Brain Food
2011
Curious and Curiouser Curious and Curiouser
2010
Game of Knowns Game of Knowns
2013
House of Karls House of Karls
2014

Audiobooks

Dr Karl's Little Book of Climate Change Science (Unabridged) Dr Karl's Little Book of Climate Change Science (Unabridged)
2021
Dr Karl's Random Road Trip Through Science (Unabridged) Dr Karl's Random Road Trip Through Science (Unabridged)
2019
Dr Karl's Surfing Safari Through Science (Unabridged) Dr Karl's Surfing Safari Through Science (Unabridged)
2020